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BerichtGeplaatst: 24-05-2018 03:47:12    Onderwerp: President Andrew Reageren met citaat
SAN FRANCISCO Adidas Superstar Mesh All Noir Pas Cher , Aug. 7 (Xinhua) -- Researchers at the University of California, Berkeley, suggest brains that continue to perform well in old age, against odds that they are slower and less accurate in short-term memory compared to those of younger people, do so by rallying more of the brain to complete mental tasks.


"We think this pattern of increased connectivity between frontal regions and other modules in the brain reflects a more integrated network architecture that is key for successful performance of executive control tasks in aging Adidas Superstar LGBT Pride Pack Core Noir Pas Cher ," said UC Berkeley graduate student Courtney Gallen, who worked with her colleagues on a study published in the August issue of the journal Neurobiology of Aging.


Under the direction of her thesis adviser Mark D' Esposito, a UC Berkeley professor of psychology, the researchers compared 18 adults in their 20s to 38 healthy people age 60 and older.


They found that the older study subjects showed larger changes than younger subjects in the organization of brain networks between a task-free state and performing a task, and that those who did not exhibit this adaptation in brain signaling were less adept in performing tasks.


"Executive control" functions are thought to underlie humans' ability to flexibly change thinking and behaviors and to solve problems.


Using functional magnetic resonance imaging (fMRI) to track communication within specific brain sub-networks - called modules - and connections made across different modules Adidas Superstar Slip On Trainer Blanche Pas Cher , the researchers also found that the structural integrity of the superior longitudinal fasciculus (SLF), which anatomically connects frontal and posterior brain regions important for short-term memory, was associated with older subjects' likelihood of exhibiting the transition to the more interconnected communication between brain regions that in turn was linked to better performance of tasks.


With focus was on the frontal cortex, which is critical for executive functions, and its connections to other parts of the brain during fMRI scanning Femme Adidas Superstar 2 Rose Bleu Fleuri Pas Cher , the researchers asked participants to perform four different tasks in two-minute trials, with five trials assigned to each participant for each task.


Images of faces and scenes, each selected from a set of 10, were flashed before the subjects sequentially, with each displayed for six-tenths of a second Femme Adidas Superstar Lotus Fleur Print Blanche Pas Cher , followed by a pause of varying length before the next was displayed.


The easiest task required participants to press a button to categorize a displayed image as either a scene or a face, and the most difficult task was to recall both the previous face and previous scene.


Compared to a task-free "resting state," older adults performing tasks of any difficulty recruited additional between-module connections. In contrast, younger adults recruited additional between-module connections only for the most difficult task.


Most previous research in which researchers looked at age-related changes in brain function due to specific cognitive demands focused on activation of individual brain regions rather than taking a network approach, Gallen said in a news release from UC Berkeley.


Earlier studies showed that frontal activity in the brain increases in older adults compared to younger adults during less-demanding cognitive tasks.


"Our new results further support the idea of compensatory recruitment and suggest a large-scale network-level mechanism by which the aging brain reorganizes to support executive control processing Femme Adidas Superstar Supercolor Pack Clair Rose Pas Cher ," she said.


ROME, July 7 (Xinhua) -- Eight people, including two children, are missing, after the partial collapse of a four-storey residential building in the town of Torre Annunziata near Naples on Friday.


The third and fourth floors of the building collapsed at 6:20 am local time (0420 GMT) Femme Adidas Superstar Supercolor Pack Clair Bleu Pas Cher , while residents were still sleeping, local media reported. Two families are missing, including a couple with two children aged about 10 years, according to RAI News24 public broadcaster.


"Torre Annunziata search ongoing with no results. Two firefighters injured. USAR (Urban Search and Rescue) teams on the way," firefighters tweeted shortly after noon Adidas Superstar Supercolor Pack Jaune Pas Cher , six hours after the collapse.


Torre Annunziata Mayor Vincenzo Ascione said the first two floors were uninhabited and were being renovated, Italian news agency ANSA reported. Televised images showed firefighters, police, and volunteers were digging through the rubble with their bare hands in search of survivors, with search dogs sniffing over the area.


A total of 70 people are taking turns in the search for survivors under the sweltering heat Adidas Superstar Foundation Collegiate Marine Blanche Pas Cher , RAI public broadcaster reported. It is still unknown what caused the collapse. The building reportedly dates back to the 1960s.


Xi urges BRICS to promote open world economy, multilateralism, common development


Xi urges mutual understanding with Singapore on core interests, major concerns


Aircraft carrier "Liaoning" sails near Lamma Island in HK


Rare photos commemorate 80th anniversary of "July 7 Incident"


Main structure of Hong Kong-Zhuhai-Macao Bridge finished


Aircraft carrier "Liaoning" sails near Lamma Island in HK


Tourists visit Int'l Bazar at Urumqi in NW China's Xinjiang


Lotus flowers blossom across China




LUSAKA, Sept. 8 (Xinhua) -- Football Association of Zambia (FAZ) on Thursday announced that it had switched to computer-based ticket sales in line with modern trends in football.


FAZ President Andrew Kamanga said the move was also aimed at improving accountability and transparency, adding that the new mode of ticketing was used during an Africa Cup of Nations qualifier against Kenya last weekend and would be used for the upcoming 2018 World Cup qualifier against Nigeria next month.


"The Kenya match last Sunday was the historic first where fans had to purchase tickets through Shoprite sta.
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